Method of making a brake shoe



R. A. GoEPFRlcH 1,935,357

METHOD OF MAKING A BRAKE SHOE A Original Filed March 15. 1928 Nov. `14,19,33.

ATTORNEY Patented Nov. 14, 1933 UNITED rss isv

signor to Bendix Aviation Corporation,

South Bend, Ind., a corporation oi Delaware @riginal application March15, 1928, Serial No..

Divided and this application .lune 15,

i932. serai No. 611,459

s chime. (ci. ,ze-i521) This invention relates to the method of makingbrake shoes, and is illustrated as embodied in the manufacture of arigid curved shoe for an internal expanding automobile brake. An objectof the invention is to provide greater rigidity for a shoe of thischaracter, by forming or displacing portions of the stiening webcrosswise oi the shoe, preferably in such a'manner that the webundulates crosswise of the shoe. -The shoe may be formed of an elementhaving a straight web which is integral with the rim, and preferablyalso integral with an inner reinforcing flange, at intervals whichalternate with portions that are structurally separate from the rim andflange and which are displaced crosswise of the shoe and then, ifdesired, welded or otherwise secured again to the rim and flange.

'Other objects and features of the invention, including novelconstructions at the ends of the shoe and various desirable details oiconstruction, will be apparent from the following description of twoillustrative embodiments shown in the accompanying drawing, in which:

Figure 1 is a .curved section, lengthwise of the shoe, on the line' 1-1of Figure 2, showing the undulation of the web A Figure 2 is a sectionthrough the shoe on the line 2-2 of Figure l;

Figures 3 and 4 are viewscorresponding respectively to Figures 1 and 2,but showing a different shoe;

Figure 5 is a side elevation of the shoe of Figures 3 and 4; and

Figure 6 is a view of the inner side of the shoe of Figures Band d.

The illustrated shoes are formed of elements, either formed in thecurved shape shown or bent from straight members, and each having anouter rim 10 (to which the brake lining 12 is riveted or otherwisesecured) and preferably also aninner reinforcing flange 14. The rim andange are connected by a web 16 (Figs. 1 and 2) or 18 (Figs. 3 6) havingat intervals portions which are integral with the rim and ange, theseportions of web 16 being along one side oi the shoe, while thecorresponding portions of web 18 are between the side edges of the shoesubstantially in the central plane of the shoe.

Between the integrally-connected portions of the webs 16 and 18 arestructurally-separate portions Z0 and 22, preferably formed by cuttingor otherwise severing the web attop and bottom..

these portions being displaced crosswise oi the shoe and if desiredagain secured to the rim and ange by welds 2t. The portions 22 oi web 18are shown alternately displaced in opposite directions. In either case,the result is a web undulating crosswise of the shoe. V

At the anchored end of the shoe, portions 26' and 28 of the rim and angeare bent smoothly around and welded to the end of the web, which is hereformed with an opening ior an anchor pivot 30. As best appears in Figured, the web 18 is preferably at one side or" the shoe at its an.n choredend, so that it will come next the baclring plate of the brake andpermit the use oi a very short and rigid anchor pin.

At the other end of the shoe the web 1S is preferably in the centralplane of the shoe, and portions 32 and 34 may be folded across andwelded to this end of the web to form a support for a hardened cam orwear plate 36 secured thereto. l

While two illustrative embodiments have been described in detail, it isnot my intentionto limit the scope of the invention to the method ofmalring those particular embodiments, or otherwise than by the terms ofthe appended claims.

This application is a division of my copending application, A:Serial No.261,714, filed March 15, 1928, entitled Brake shoes.

I claim:

1. That method of making a brake shoe which comprises forming an elementwith a rim and a stiiening web integral with the rim. at intervalsalternating with intervals in which its' entire width is structurallyseparate from the rim, and

then displacing the structurally separate parts of the web crosswise ofthe rim to give support to said rim over a broad area.

2. That method of making a brake shoe which comprises forming an elementwith a rim and a spaced reinforcing flange and with a st'ifening webintegral with the rimandflange at intervals alternating with intervalsin which its entire width is structurally separate from the rim andiiange, and then displacing the structurally separate parts of the webcrosswise of the rim and ange to give support to said rim and flangeover their entire width.

3. That method of making a brake shoe which comprises forming an elementwith a rim and a stiening webintegral with the rim at intervalsalternating with intervals in which it is struc turally separate fromthe rim, and then displacing the structurally separate parts ofthe webcrosswise of the rim, and nally welding the displaced parts of the webto the rim.

d. That method of making a vbrake shoe which comprises formingan elementwith a rim and a.

tervals from the remainder of the structural shape and stretching anddisplacing the web laterally at its severed sections to increase thebreadth of support for the remainder of the structural shape.

6. The method of making a brake shoe from a structural shape having aweb, which comprises severing sections of the web along its edge atintervals from the remainder of the structural` shape, stretching anddisplacing the web laterally at its severed sections and securing saiddisplaced web sections to the remainder of the structural shape.

RUDOLPH A. GOEPFRICH.

